Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b3bf5666 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller
Browse files

hv_netvsc: defer queue selection to VF 



When VF is used for accelerated networking it will likely have
more queues (and different policy) than the synthetic NIC.
This patch defers the queue policy to the VF so that all the
queues can be used. This impacts workloads like local generate UDP.

Signed-off-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 68633eda

drivers/net/hyperv/netvsc_drv.c

+13 −2
Original line number Diff line number Diff line
@@ -298,8 +298,19 @@ static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb, 
	rcu_read_lock();

	vf_netdev = rcu_dereference(ndc->vf_netdev);

	if (vf_netdev) {

		txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;

		qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;

		const struct net_device_ops *vf_ops = vf_netdev->netdev_ops;



		if (vf_ops->ndo_select_queue)

			txq = vf_ops->ndo_select_queue(vf_netdev, skb,

						       accel_priv, fallback);

		else

			txq = fallback(vf_netdev, skb);



		/* Record the queue selected by VF so that it can be

		 * used for common case where VF has more queues than

		 * the synthetic device.

		 */

		qdisc_skb_cb(skb)->slave_dev_queue_mapping = txq;

	} else {

		txq = netvsc_pick_tx(ndev, skb);

	}